Contents of /eclass/gst-plugins-good.eclass

Fully validate and clean up plugin list for current versions. Reorder them per configure --help output, in order of global/sys/ext switches. Add directsound, osx_audio and osx_video to avoid useless header/linking configure checks for all -good plugins and save some configure time. Remove ladspa and cdio from the list, they have not been part of -good since 0.10.8 and 0.10.10 respectively, so safe to remove and avoid the unrecognized configure option QA warnings.